Needle flame dual control burner



p 30, 1947. J. H.1FLYNN Em. 2,428,274

NEEDLE FLAME DUAL- CONTROL BURNER Filed march 1, 1944 4 25 5 Fina. 7

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INVENTORSV Patented Sept. 30, 1947 John Harold Flynn and William B.Ensign, New

Rochelle, N. Y., assignors to Ensign Ribbon Burners, Inc., Mount Vernon,N. Y., a corporation of New York Application March 1, 1944, Serial No.524,580

2 Claims. (01.158-99) This invention relates to a burner adapted to burngaseous fuel to produce a combination of a main high velocity flame andlow pressure piloting flames to assure a steady and even application ofheat where wanted.

An object of the invention is the provision of a burner of the indicatedcharacter embodying improvements whereby the gaseous fuel may bedelivered from a common source of supply to ports producing theknife-type needle main flame and to the ports producing the pilot ribbonflames, simultaneously, or to one set of the ports so that a regulatedflow. of fuel for the pilot flames may be provided, or to stop the flowto extinguish the pilot flames if desired. By .providing acontrolledfeed for the pilot flames of the burner it is possible to use differentkinds of gaseous fuel in different amounts so that the main flame willalways have the desired volume and heating efficiency. Also, thecharacteristics of the main flame may affect the amount of fuel to thepilot flames and this may beremedied by the novel controlled feed of theburner.

A further object of the invention is the provision of novel form of gasport or jet grid structure for producing needle type main flames in aribbon type burnen,

With the foregoing, other objects of the invention will appear when thefollowing specification is read in conjunction with the accompanyingdrawing, in which- Fig. lziis across-sectional View of a burnerconstructed in accordance with'the invention, the section being taken onthe line l--I of Fig. 2.

Fig. 2 is a view partly in side elevation and partly in longitudinalsection with portions broken away.

Fig. 3 is an enlarged fragmentary cross-sectional View showing the portor jet grid structure of the burner.

Fig. 4 is a sectional plan view, the section being taken approximatelyon the line 4--4 of Fig. 2.

Fig. 5 is a cross-sectional view taken on the line 5-'-5 of Fig. 2.

Fig. '6 is a fragmentary perspective view of ribbons for producingneedle type main flames. Fig. 'I is a view similar to Fig. 6 showingmodification of the ribbons.

Fig. 8 is a fragmentary cross-sectional view of modification forcontrolling the flow of fuel.

Fig. 9 is a sectional view of an adaptor for controlling the flow offuel.

Referring now more particularly to the drawing, it will be seen theburner includes an elon- 2 gated hollow body l0 which may be of anysuitable length and shape. In the present instance the body II) issubstantially rectangular in longitudinal aspect and also rectangularin'cross-section except that the body slopes at each side at the top. Atthe middle there is an extension H which enlarges the body for a portionof its length at the bottom side as shown in Fig. 2. The body Ill has alongitudinal slot l2 in the top wall l3 thereof. Horizontal flanges l4project inwardly fromlthe side walls l5 in spaced relation to the topwall. 'The flanges l4 are in the same plane and provide a longitudinalslot l6 equal in length and width to slot l2. The body II] has removableend wall sections I1, and a stepped bottom wall iii. A separate ribbongrid gas port or jet structure I9 is designed and adapted to fit in andwholly occupy the slots I2 and IS. The walls and flanges of the body,together with the structure l9,.form a main'chamber 20 and branchpassages 2 I' each extending the full length of the body. The end wallsll close the opposite ends of the slots l2 and IS. A U-shape passage 22is formed within the body l0 transversely thereof. The opposite ends ofthe passage 22 communicate with the passages 2| respectively atintermediate points above the extension ll. The bottom wall I8 at theextension has a tapped inlet 23 which communicates with the chamber 20,and a tapped inlet 24 which communicates with the passage 22. Thegaseous fuel is fed to the inlets 23 and 24 bypipes 25 and 26 connectedtherewith respectively and connected withan external fuel supply source.Thus fuel or gas is fedto the main chamber 20 from the pipe 25 and anindependent supply of fuel is fed to the passage 22 and passages 2| fromthe pipe 26.

The structure I!) provides means for producing low pressure or pilotingflames at either side of a high velocity knife-type needle-main flame.The-structure I9 includes channels 21 fittin in the slots l2 and I6 andarranged side by side in spaced relation to each other in contact withthe side walls of said slots throughout the length thereof and incontact with the sections ll.

Thus, a space 28 is provided between the channels 21, and said spacecommunicates with the main chamber 20. Thetop or open side of eachchannel 21 is disposed upwardly. Crimped or corrugated strip material,such as ribbons 29, of sheet steel are placed within the space 28 infrictional contact with the side walls of the channels 21. The ribbonsmay be diversely crlmped or corrugated to provide a multiplicity ofports or Jets in spaced relation to each other and obstructing portionscontacting the walls of the channels to prevent leakage between thechannels and ribbons. In Fig. 6 there are shown portions or two stripsor ribbons 23 which are similar in construction. Each strip is crimpedto provide transverse corrugations 3| in spaced parallel relation toeachother, and a longitudinal corrugation 32 merging into thecorrugations 3|. When two strips or ribbons are laid togetherslde-by-side and are placed in the space 22 designed to receive them, amultiplicity of vertical ports or Jets 33 will be provided. These portsor Jets 33 will be spaced from each other a predetermined distance.Also, the corrugations 32 contacting the opposite walls of the channelswill act as an obstructing means to prevent the escape 01' gas upwardlybetween the channels and strips and cause the gas'to leave the ports orlets 33 to produce a series of needle flames of high velocity to serveas the main flame.

Crimped or corrugated material 36 is placed within each of the channels21. Only one strip is shown, but it is to be understood any number ofstrips may be used and each strip may be of any construction to providea multiplicity of ports or Jets 3'! designed to produce a staticpressure and velocity oi. the gas from the passages 21 through the holes34 to provide a continuous sheet 01' flame to produce the pilotingflames. The ribbon 36 is of less width than the depth of-the channel 21,which provides the gas expansion and distribution space 30 theentire'length of the channel. The parts of the structure It may be heldtogether by any suitable means, such as pins, extending transverselythrough the channels 21 and strips 29 and 36. t

In one of the side walls of each channel 21 there are a plurality ofholes or orifices 34 for the inflow of gas from the related passage 21to a space It. The holes 34 restrict the flow of gas and together withthe space 30 decrease the velocity of the gas so that the fuel supply isequalized the entire length 01' the flame space.-

In Fig. 7 modifications of the strips or ribbons 23 are shown. Thedifference is in the provision of angularly bent edge portions 33 inlieu of the I corrugation 32, said portions 35 serving the same' purposeas the corrugation 32. The portions 35 may be along one or bothlongitudinal edges 01' each strip.

The burner shown in Figs. 1 to 5 inclusive, produces low pressure ribbontype piloting flame at eitherside of a high velocity main knifetypeneedle flame to prevent extinguishment or the latter. The gas issupplied from an external source to port areasoi the main flame in aseparate path from the paths to the port areas of the piloting flames.This enables control of the gas to the main flame independently of thepiloting flames to meet thermal conditions.

In accordance with the invention, the flow oi gas to the pilots may becontrolled by means of a regulating valve structure shown in Fig. 8.There is provided a beveled seat 33 surrounding a port 39 in a wall ofthe passage 22. A screw valve member 43 is inserted in the inlet 24which cooperates with the seat 38. It is understood the pipe 23 isremoved since it is not necessary. Gas may be diverted to flow from thechamber 20 through the port 39 into the passage 22, passages 2|, holes34, space 33 to the pilots. when the member 40 is oi! or the seat 38, asshown in Fig. 8. At the same time gas may flow from the main chamber 20up through the space 28 to the main flame ports 31. By engaging thevalve member 43 with the seat 38, gas to the pilots may be shut oil ifdesired. Also, by adjusting the valve member 40 regulated amounts Of gasmay be supplied to the pilots.

Further results may be accomplished by using a hollow valve member 4| inlieu of the member 44, The member 4| is closed at one end as at 42, andthe other end is open and tapped as at 43 to receive a gas supply pipeindicated in dotted lines. The member 41 has ports 44 therein. Whenthe-valve member 4| is engaged with the seat 34, gas to the main flameport area will flow from the chamber 20 to the main flame port area.Also, gas flows from the external source through the ports 44 of thevalve member 4| to the passage 22, passages 2|, through holes 34 to thespaces 30, and finally to the pilot port areas. Thus, both the pilot andmain flames are kept burningindependently of each other to meetconditions.

It is to be understood the invention is not restricted to the preciseshowing in the drawing but that details oi construction may be modifiedand rearranged in accordance with spirit of the invention as defined inthe claims.

We claim:

1. For use in a gas burner to produce a multiplicity of gas jets inconjunction with the walls of a slot of the burner, an elementconsisting of a strip of material bent to provide transversecorrugations extending entirely across the element in spaced parallelrelation to each other and a longitudinal corrugation throughout thestrip adapted to serve as a gas obstructor to prevent gas leakage.

2. A gas burner comprising an elongated body having a chamber therein toreceive a supply of gas and a continuous slot extending longitudinallyof the body and communicating with said chamber, and strips in saidslot, each or said strips having transverse corrugations extendingentirely across the strip in spaced relation to each other andlongitudinally disposed portions joining said corrugations throughoutthe strip, the corrugations of one strip being opposite those of theother strip providing the ports to receive gas from said chamber toproduce flames, and said longitudinally disposed portions contacting thewalls of said slot to prevent gas leakage.

JOHN HAROLD FLYNN.

Germany Apr. 13, 1934 extending continuously"

